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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Compensation Expense Recognized Related to all Stock-Based Awards

The following table presents compensation expense recognized related to all stock-based awards (in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2015

 

 

2014

 

 

2015

 

 

2014

 

Total stock-based compensation

 

$

3,161

 

 

$

1,410

 

 

$

5,542

 

 

$

2,703

 

 

Summary of Stock Option Awards

The following table presents a summary of stock option awards for the six months ended June 30, 2015:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

Average

 

 

Aggregate

 

 

 

 

 

 

 

Exercise

 

 

Remaining

 

 

Intrinsic

 

 

 

 

 

 

 

Price

 

 

Contractual

 

 

Value

 

 

 

Options

 

 

Per Share

 

 

Life

 

 

(in thousands)

 

Options outstanding at December 31, 2014

 

 

3,467,086

 

 

$

13.05

 

 

 

6.0

 

 

$

7,642

 

Granted

 

 

 

 

 

 

 

 

 

 

 

 

Exercised

 

 

(91,880

)

 

 

10.63

 

 

 

 

 

 

 

 

 

Forfeited

 

 

(11,303

)

 

 

8.39

 

 

 

 

 

 

 

 

 

Options outstanding at June 30, 2015

 

 

3,363,903

 

 

 

13.12

 

 

 

5.6

 

 

 

7,349

 

Options exercisable at June 30, 2015

 

 

2,872,860

 

 

 

12.41

 

 

 

4.9

 

 

 

8,309

 

 

Summary of Restricted Stock Units

The following table presents a summary of restricted stock units (“RSUs”) for the six months ended June 30, 2015:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

Aggregate

 

 

 

Restricted

 

 

Grant Date

 

 

Intrinsic

 

 

 

Stock

 

 

Fair Value

 

 

Value

 

 

 

Units

 

 

Per Share

 

 

(in thousands)

 

Nonvested RSUs at December 31, 2014

 

 

900,547

 

 

$

15.62

 

 

$

13,461

 

Granted

 

 

1,511,491

 

 

 

11.46

 

 

 

17,315

 

Vested

 

 

(453,685

)

 

 

13.85

 

 

 

 

 

Forfeited

 

 

(10,193

)

 

 

13.58

 

 

 

 

 

Nonvested RSUs at June 30, 2015

 

 

1,948,160

 

 

 

12.20

 

 

 

29,807